Nut lock



Patented Feb. 6, 1923.

r ED ST.

TE S

PATENTgOFEICE,c

MA'I'T WILLIAM KOSKI, OF RAYMOND, WASHINGTON.

' VNUT LOCK.

Application filed'J'anuary 23, 19a. ser a ivo. 531,156..

A further objectis to provide a nut lock which is simple in construction,'cheap to make, and reliable in its holding action. I My invention comprises those novel parts and combinations thereof which are shown in the accompanyingdrawings, described in the specification, and particularly defined by the claims terminating the same.

In the accompanying drawings I have shown my invention in the. form which is nowpreferred by me.

Figure-1 is a top plan View of the lock washer forming a part of my invention.

Figure 2 is side elevation of the holding nut, the lock nut and the lock washer, which together constitute my invention, parts being shown in a position where the lock-nut has not quite been threaded home Figure 3-is a-view.'similar to Figure ,2,

showing the lock nut parts being shown in the locked position. 7

Figures 4, 5 and 6 are side elevations of mydevice in the locking position, showing the various ratchet and holding elements.

My invention contemplates the use of a holding nut 2 and a lock nut 3, both of which are intended to thread upon an ordinary bolt 4, and in connection with these nuts, means for preventing relative rotation thereof in such direction as to permit axial separation thereof and also means for preventing rotation in the opposite direction, that is, in that direction which causes one nut to approach the other, beyond a certain predetermined point.

The ratchet means which will prevent unscrewing of the lock nut 3 and its axial separation from the holding nut 2, I have shown as combined in a single element with the member which prevents too close approach of the nuts 3 and 2. I have shown a lock washer 1 having a central opening 10 which is intended to fit about the bolt 4 and to threaded fully home,

the shoulders 20 v and posed between'the nuts 2 and 3. The nuts 2 and 3ers, each provided withlshoulders or ratchetteethli20aor30 asthe case may be, facing oppositely upon the two vopposite slide thereupon, thisrwasher ibeinginterv nuts and engageable by pawls 11, formed upon the washer 1. These pawls 11 may be cut ,out and sprung from the washer l, which is'fpreferably ofspring material or of .a spring-like character, and upon approach of the nuts 3 and 2 the pawls 11 engaging 30 will prevent reverse or unscrewing rotation of the nuts.

I also vprovide 'a'holding pawl 14 upon the lock washer,this

pawl facing oppositely to theratchet pawl 11 on the washer which engages the same nutas this holding pawl 1411 This-pawl l4lwill engage a shoulder" 21, forinstance upon the nut 2,, and when so engaged will prevent rotation of the washer '1 in the same. direction as the lock nut 3 which is being threaded on. 1 I I have shown the means for 'preventin too close :approach :of the nuts, as combine in a u nit vith the lock washer. 1.-v The washer l is provided .witha tooth having I a holding point 12ywhich is normally depressed beneath the surface of thewasher 1 but which is projectable toward one or the other of the nuts 2 or 3, beingthe one opposite that with which the pawl 14 isengaged. One of these nuts, shownhereinas the lock nut 3, isoprovided-with a shoulder.

31 which may be engaged by the point 12 of the.,too th.- Tl1ls t00tl1 also has a heel portion13 which is adapted to be contacted bythe other nut.2.' y

As the two nuts approach eachother, the heel l3 bearing upon the nut 2, the nut 3, will pass over the depressed holding point 12. The pawls 11 engaging both nuts 2 and 3 will prevent reverse rotation thereof, and the pawl 14 engaging the nut 2 will prevent advance rotation of the washer 1. As advance rotation progresses the pressure of the locknut 3 upon the upper surface of the washer 1 will react through the heel 13 to cause projection of the holding point 12 above the surface of the washer 1. 7 Thus it will eventually engage the shoulder 31, and when so engaged, as is shown in Figure 3, advance rotation, that is rotation in the direction to cause approach of the nuts 3 and 2, will be prevented. The point where such action will take place may be determined by the length and inclination of the in opposite *(lirecti I :when it 71s des red to point l1; is immaterial hich id e of the washer 1 is uppermost, for if it'were re upon the belt 4 a I i t sfmeim a e i'y- U the washer 1 with flierthey "may fbje in z 1. In a "nfit Ock, "the fcdinbination a "Iiiitj and a i To ck r nit i'r'iez'u ls infer- 'e' n'gaig eabl e 'betweeln 'slaid runs] to prevent their relatiye rotation in "'a direction to 'separate "them axially, fand 5 resilient, 'nlornially "inoperative nieaiis 'litayingfratchet *meansfefigageable I 1 rtfiutd' upon each of said'nuts to prevent relative rotation of the nuts: in=a direction to gseparate them axially,

in a direction {a V normally 139m Fiby in.

N With 00 operating means and means on said washer normally inoperati've, but operable by approach of said nuts to engage one of said nuts to prevent rotaapproach each other beyond a predeterthic knee s of paid Washer.

mined point which i'si f artli'r were than the y In a 1ft lock, "the combination -iifi a asher their approa ch beyond a predetrnilhet heinuts 7 nuts topreventrelative r atidn oftheiiiuts 

